This add-on is fine. It works and all. But in this add-on there are such tiny thumbnails and so enormously huge gaps between text lines. I saw screenshots on add-on page and i don't want three videos per whole page, i want at least six. It is convenient and comfortable for my eyes. But then i tweek the settings all i get is huge fonts and microscopic thumbnails. So i don't get it.

As far as my limited ability goes, does not work at all. It is possible I am stupid thouhg.

EDIT: On consulting with ai it turns out that the location of the toggle button is apparently subject to an AB test? so if you try to install it new you need to put
localStorage.setItem('yslv', 'list'); location.reload();
otherwise it's just completely inaccessible

I see black text on a dark background in channel titles and video descriptions. Only the video title is white.